Features stainless steel:

[minhtu89]

Stainless steel is an alloy on the basis of their nature Fe mainly against corrosion in different environments. However, to understand the nature of "stainless" here is relative to conventional steel. And in fact, every kind of stainless steel only high corrosion resistance in a given environment, and even in that environment, but it has eroded significantly speeds should not be regarded as stainless .

Of the approximately 16 ~ 18 alloying elements used in stainless steel, the elements C, Ni, Cr, Mo, Mn, Si, Nb is the main influential elements, determining the structure and properties quality of steel. In particular, the alloying elements Cr decision for stainless steel properties. An explanation of this could be in 2 ways as follows:

* At concentrations of 12% or higher chromium, stainless steel made in the environment due to surface oxidation is protected by passive membrane Cr2O3 ..

* When ferrite containing 12.5% ​​Cr not less, its electrode voltage increases the voltage equivalent of cementation phases (carbides in general) -> Advanced resistance to galvanic corrosion -> made of stainless steel.